I'm catching up on the blog reading this afternoon - this piece from Tim Anderson on Serena's decision to dump Google (they'd originally selected Google to replace on-premise Microsoft stack) and move to our hosted Exchange and Sharepoint services caught my eye.
 
In particular this is an interesting statement from the blog post authored by Ron Brister of Serena:

There are alternatives on the market that promise lower costs, but in our experience, this is a fallacy.  When looking at alternatives, CIOs should really evaluate the total cost of ownership as well as the impact on user productivity and satisfaction, as there can be hidden costs and higher TCO.  For instance, slow performance and/or lack of enterprise-class features (e.g., with calendaring and contact management) will torpedo the value of such a backbone system, and may get the CIO fired.
My own view: the honeymoon is over Googlies.